Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Chemistry (184)
- Mathematics (175)
- Engineering (126)
- Social and Behavioral Sciences (100)
- Electrical and Computer Engineering (96)
-
- Physical Chemistry (89)
- Earth Sciences (77)
- Materials Chemistry (77)
- Materials Science and Engineering (75)
- Engineering Science and Materials (71)
- Statistics and Probability (70)
- Applied Statistics (64)
- Computer Sciences (64)
- Education (64)
- Statistical Theory (64)
- Environmental Sciences (57)
- Science and Mathematics Education (55)
- Power and Energy (51)
- Physics (46)
- Computer Engineering (45)
- Law (38)
- Life Sciences (35)
- Catalysis and Reaction Engineering (33)
- Chemical Engineering (33)
- Computer Law (32)
- Information Security (32)
- Analysis (29)
- Applied Mathematics (29)
- Other Mathematics (28)
- Institution
-
- TÜBİTAK (214)
- Chinese Chemical Society | Xiamen University (87)
- University of South Florida (76)
- Wayne State University (64)
- Thomas Jefferson University (62)
-
- University of Montana (43)
- Chulalongkorn University (32)
- Embry-Riddle Aeronautical University (32)
- Prairie View A&M University (30)
- Louisiana State University (27)
- Virginia Commonwealth University (19)
- Universitas Negeri Yogyakarta (12)
- University of Arkansas, Fayetteville (12)
- Bulletin of the Mineral Research and Exploration (10)
- University of Northern Iowa (10)
- University of South Carolina (10)
- Old Dominion University (8)
- Bridgewater State University (7)
- Georgia Southern University (7)
- National Taiwan Ocean University (4)
- The University of Maine (4)
- William & Mary Law School (4)
- Syracuse University (3)
- Andrews University (2)
- Florida International University (2)
- California Polytechnic State University, San Luis Obispo (1)
- Institute of Business Administration (1)
- Kennesaw State University (1)
- Maurer School of Law: Indiana University (1)
- Sacred Heart University (1)
- Keyword
-
- Turkey (12)
- Mathematics (10)
- Educational resource (9)
- Classroom practice (8)
- Quantitative literacy (8)
-
- Assessment (7)
- Electrochemical performance (7)
- Policy (7)
- Geology (6)
- Monte Carlo simulation (6)
- 1 (5)
- Cyclic voltammetry (5)
- Direct methanol fuel cell (5)
- Eastern Pontides (5)
- Fuel cell (5)
- Power (5)
- Stability (5)
- 2 (4)
- 3 (4)
- Management (4)
- Numeracy (4)
- QL/QR centers (4)
- Quantitative Literacy (4)
- Reliability (4)
- Statistics (4)
- Sustainability (4)
- Adults (3)
- Archeology (3)
- Biodiesel (3)
- Carbon nanotubes (3)
- Publication
-
- Journal of Electrochemistry (87)
- Turkish Journal of Chemistry (82)
- Journal of Modern Applied Statistical Methods (64)
- Sci-Tech News (62)
- The Mathematics Enthusiast (43)
-
- Turkish Journal of Mathematics (40)
- Turkish Journal of Physics (39)
- Environmental Journal (32)
- Journal of Digital Forensics, Security and Law (32)
- Applications and Applied Mathematics: An International Journal (AAM) (30)
- Turkish Journal of Earth Sciences (28)
- Communications on Stochastic Analysis (27)
- Numeracy (26)
- Turkish Journal of Electrical Engineering and Computer Sciences (25)
- Journal of Mathematics and Science: Collaborative Explorations (19)
- Studia UBB Geologia (18)
- International Journal of Speleology (16)
- Undergraduate Journal of Mathematical Modeling: One + Two (16)
- PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika (12)
- Bulletin of the Mineral Research and Exploration (10)
- Journal of the Iowa Academy of Science: JIAS (10)
- Journal of the South Carolina Academy of Science (10)
- Virginia Journal of Science (8)
- Journal of the Arkansas Academy of Science (7)
- Undergraduate Review (7)
- Journal of Marine Science and Technology (4)
- Proceedings of the Annual Meeting of the Georgia Association of Mathematics Teacher Educators (4)
- William & Mary Environmental Law and Policy Review (4)
- Georgia Educational Researcher (3)
- Inquiry: The University of Arkansas Undergraduate Research Journal (3)
Articles 1 - 30 of 790
Full-Text Articles in Physical Sciences and Mathematics
Parts Of The Whole: Observing The State Of The System, Dorothy Wallace
Parts Of The Whole: Observing The State Of The System, Dorothy Wallace
Numeracy
This column draws on the approach of statistician J. Edwards Deming to analyze sources and consequences of variation in an education system. Educational systems are not immune from the effects of poor statistical control, which makes it difficult for teachers to teach effectively and for managers such as principals to improve on school performance. It is also argued that the need for statistical control in these areas is in tension, if not outright conflict, with our goals for educating students.
Two Popular Books For Quantitative Literacy: What The Numbers Say, And The Numbers Game, Robert G. Root
Two Popular Books For Quantitative Literacy: What The Numbers Say, And The Numbers Game, Robert G. Root
Numeracy
Niederman, Derrick, and Boyum, David. What the Numbers Say: A Field Guide to Mastering Our Numerical World. (New York: Broadway Books/Random House, 2003). 288 pp. Hardcover, ISBN 978-0-7679-0998-3. Paperback, 978-0-7679-0999-0. Available as an eBook.
Blastland, Michael, and Dilnot, Andrew. The Numbers Game: The Commonsense Guide to Understanding Numbers in the News, in Politics and in Life. (New York: Gotham Books/Penguin, 2009). 192 pp. Hardcover, ISBN 978-1-5924-0423-0. Paperback, ISBN 978-1-5924-0485-8. Available as an eBook.
Popular books on quantitative literacy need to be easy to read, reasonably comprehensive in scope, and include examples that are thought-provoking and memorable. In contrast …
Numeracy: Open-Access Publishing To Reduce The Cost Of Scholarly Journals, Todd A. Chavez
Numeracy: Open-Access Publishing To Reduce The Cost Of Scholarly Journals, Todd A. Chavez
Numeracy
Each fiscal year, as academic librarians throughout the United States prepare materials budgets, a national “groan” ensues. Regardless of their format (i.e. print or digital), serial subscription costs are escalating, in the process impacting the role of the library in advancing scholarly communication . This paper examines some of the economic issues concerning open-access (OA) journal publishing. The importance of quantitative literacy is suggested for librarians and academics seeking a better understanding of alternatives to traditional journal subscription models and to anyone considering ventures into OA publishing. Quantitative literacy is essential for managing alternatives to the rising cost of scholarly …
College Algebra In Context: A Project Incorporating Social Issues, Michael T. Catalano
College Algebra In Context: A Project Incorporating Social Issues, Michael T. Catalano
Numeracy
This paper discusses the development of an innovative college algebra text designed for use in a data-driven, activity-oriented college algebra course, incorporating realistic problem situations emphasizing social and economic issues, including hunger and poverty, energy, and the environment. The course incorporates quantitative literacy themes, is informed by existing college algebra texts within the college algebra reform movement, and implements a collaborative pedagogical approach intended to provide future K-12 teachers an alternative model for the teaching of mathematics. The paper contains a short history of the project development phase, supported by an NSF grant (DUE #0442979), as well as the perceived …
An Activity Promoting The Practice Of Quantitative Literacy For Pre– And In–Service Teachers Of Mathematics And Science, Timothy L. Sorey, Teri Willard, Duane Sholz
An Activity Promoting The Practice Of Quantitative Literacy For Pre– And In–Service Teachers Of Mathematics And Science, Timothy L. Sorey, Teri Willard, Duane Sholz
Numeracy
The purpose of this article is to describe a hands-on, laboratory activity that provided pre-service teachers in mathematics and science methods courses, and also some in-service mathematics teachers, with the opportunity to exercise quantitative literacy (QL) skills. The focus of the activity is electrical resistance, more particularly the resistance (in ohms) that is painted on small resistors by the use of color-coded bands, one of which is a band for % error. The activity consists of four parts. In the first, student teams familiarize themselves with the code, measure the ohmage of resistors for which the codes are visible, and …
Are Statistics Labs Worth The Effort?--Comparison Of Introductory Statistics Courses Using Different Teaching Methods, Jose H. Guardiola, Nadina Duran-Hutchings, Hassan Elsalloukh
Are Statistics Labs Worth The Effort?--Comparison Of Introductory Statistics Courses Using Different Teaching Methods, Jose H. Guardiola, Nadina Duran-Hutchings, Hassan Elsalloukh
Numeracy
This paper compares the academic performance of students in three similar elementary statistics courses taught by the same instructor, but with the lab component differing among the three. One course is traditionally taught without a lab component; the second with a lab component using scenarios and an extensive use of technology, but without explicit coordination between lab and lecture; and the third using a lab component with an extensive use of technology that carefully coordinates the lab with the lecture. Extensive use of technology means, in this context, using Minitab software in the lab section, doing homework and quizzes using …
Envisioning A Quantitative Studies Center: A Liberal Arts Perspective, Gizem Karaali, Philip I. Choi, Sara Owsley Sood, Eric B. Grosfils
Envisioning A Quantitative Studies Center: A Liberal Arts Perspective, Gizem Karaali, Philip I. Choi, Sara Owsley Sood, Eric B. Grosfils
Numeracy
Several academic institutions are searching for ways to help students develop their quantitative reasoning abilities and become more adept at higher-level tasks that involve quantitative skills. In this note we study the particular way Pomona College has framed this issue within its own context and what it plans to do about it. To this end we describe our efforts as members of a campus-wide committee that was assigned the duty of investigating the feasibility of founding a quantitative studies center on our campus. These efforts involved analysis of data collected through a faculty questionnaire, discipline-specific input obtained from each departmental …
A Rubric For Assessing Quantitative Reasoning In Written Arguments, Nathan D. Grawe, Neil S. Lutsky, Christopher J. Tassava
A Rubric For Assessing Quantitative Reasoning In Written Arguments, Nathan D. Grawe, Neil S. Lutsky, Christopher J. Tassava
Numeracy
This paper introduces a rubric for assessing QR in student papers and analyzes the inter-rater reliability of the instrument based on a reading session involving 11 participants. Despite the disciplinary diversity of the group (which included a faculty member from the arts and literature, two staff members, and representatives from five natural and social science departments), the rubric produced reliable measures of QR use and proficiency in a sample of student papers. Readers agreed on the relevance and extent of QR in 75.0 and 81.9 percent of cases respectively (corresponding to Cohen’s κ= 0.611 and 0.693). A four-category measure of …
Confessions Of A Weak Tie, Joel Best
Five Thousand Downloads, H L Vacher
Bifurkasi Hopf Dalam Model Epidemi Dengan Waktu Tundaan Diskret, Rubono Setiawan
Bifurkasi Hopf Dalam Model Epidemi Dengan Waktu Tundaan Diskret, Rubono Setiawan
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Di dalam suatu model epidemi dengan waktu tundaan diskrit, jika berubahnya waktu tundaan dapat mengakibatkan perubahan sifat kestabilan dari titik ekuilibrium penyakitnya, maka dikatakan terjadi bifurkasi Hopf di titik ekuilibrium penyakit tersebut. Secara umum bifurkasi membicarakan tentang perubahan struktur orbit dari suatu sistem persamaan diferensial seiring dengan perubahan nilai parameternya. Didalam analisa kestabilan titik ekuilibrium model epidemi dengan waktu tundaan diskrit , waktu tundaan dianggap sebagai parameter bifurkasi. Kemudian bifurkasi yang berkaitan dengan adanya nilai eigen kompleks murni disebut bifurkasi Hopf (Andronov - Hopf).
Kata kunci : bifurkasi Hopf , waktu tundaan , nilai eigen kompleks murni.
Model Pertumbuhan Populasi Berdasarkan Kelompok Umur, Dwi Lestari
Model Pertumbuhan Populasi Berdasarkan Kelompok Umur, Dwi Lestari
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Penelitian matematika dalam bidang demografi dan ekologi sangatlah penting. Salah satu penelitian di bidang tersebut adalah tentang pertumbuhan populasi. Paper ini akan membahas tentang model pertumbuhan populasi berdasarkan kelompok umur. Model populasi berdasar kelompok umur merupakan model untuk memprediksi jumlah populasi di waktu yang akan datang berdasarkan kelompok umur. Model ini berbentuk kontinu atas waktu dan diskret atas kelompok umur. Model ini dikembangkan dari model pertumbuhan populasi berdasarkan kelompok umur dengan ukuran waktu diskret dan ukuran umur diskret. Dalam hal ini akan dibahas model kontinu atas waktu dan diskret atas umur sehingga diperoleh model berupa sistem persamaan diferensial serta model …
Pembentukan Isomorfisma Dari Gelanggang Faktor Ke Gelanggang Faktor Lokal, Amir Kamal Amir
Pembentukan Isomorfisma Dari Gelanggang Faktor Ke Gelanggang Faktor Lokal, Amir Kamal Amir
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Suatu gelanggang lokal adalah gelanggang yang hanya mempunyai satu ideal maksimal. Ideal prim suatu gelanggang dapat dipakai untuk mencari gelanggang local dan dapat juga dipakai untuk membentuk gelanggang faktor. Sedangkan ideal maksimal dari gelanggang lokal dapat dipakai untuk membentuk gelanggang faktor lokal. Tulisan ini akan memaparkan secara lebih terperinci dan jelas, sehingga akan lebih mudah dimengerti, mengenai gelanggang faktor dan pembentukan isomorfisma antara gelanggang faktor dengan gelanggang faktor lokal.
Keywords: faktor , gelanggang lokal, maksimal, multiplikatif, ideal prim.
Analisis Konjoin Untuk Menilai Pembukaan Program Studi Statistika Di Universitas Syiah Kuala, Asep Rusyana, Nanny Salwa, Muzamil Muzamil
Analisis Konjoin Untuk Menilai Pembukaan Program Studi Statistika Di Universitas Syiah Kuala, Asep Rusyana, Nanny Salwa, Muzamil Muzamil
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Analisis konjoin biasa digunakan untuk mengukur tingkat kesukaan responden terhadap suatu produk. Pada penelitian ini, analisis konjoin diterapkan untuk mengidentifikasi penilaian dosen terhadap rencana pembukaan Program Studi Statistika di FMIPA Unsyiah. Atribut-atribut yang dilibatkan adalah dosen, peminat, pengguna lulusan, ruang kuliah, dan laboratorium. Responden terdiri atas 40 orang dosen FMIPA Unsyiah. Pengambilan contoh menggunakan penarikan contoh acak berlapis. Jurusan Matematika, fisika, kimia, dan biologi adalah masing-masing lapisan. Hasil penelitian menunjukan bahwa Ruangan adalah atribut yang paling penting untuk diperhatikan dan dosen FMIPA berpendapat bahwa ruangan kuliah kurang, pengguna lulusan banyak, dosen cukup, ruang laboratorium buruk, dan peminat kurang; sehingga kekurangannya …
Perbandingan Model Arima Dan Model Regresi Dengan Residual Arima Dalam Menerangkan Perilaku Pelanggan Listrik Di Kota Palopo, Alia Lestari
Perbandingan Model Arima Dan Model Regresi Dengan Residual Arima Dalam Menerangkan Perilaku Pelanggan Listrik Di Kota Palopo, Alia Lestari
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Persediaan sumber daya energi di bumi ini semakin hari semakin menipis. Upaya penghematan energi merupakan salah satu usaha yang perlu dilakukan, termasuk melakukan penghematan penggunaan listrik. Oleh karena itu diperlukan suatu metode yang tepat untuk mengkaji perilaku pelanggan listrik. Dalam makalah ini akan dibandingkan model Autoregressive Integrated Moving Average (ARIMA) dan model Regresi dengan residual ARIMA dalam menerangkan perilaku pelanggan listrik di Kota Palopo. Hasil analisis menunjukkan bahwa model ARIMA lebih baik dari model Regresi dengan residual ARIMA.
Kata kunci : ARIMA, Regresi, Pelanggan Listrik
Integral Henstock-Stieltjes Fungsi Bernilai Vektor, Umi Mahnuna Hanung, Ch. Rini Indrati
Integral Henstock-Stieltjes Fungsi Bernilai Vektor, Umi Mahnuna Hanung, Ch. Rini Indrati
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
This paper discusses about the generalization of the Henstock-Stieltjes integral for vector-valued functions which are defined on a closed interval [a,b]Š‚R. The generalization has been done up to the existance of this integral.
Key words: Henstock-Stieltjes integral, vector-valued function and bounded function.
Pemodelan Regresi Zero Inflated Poisson (Aplikasi Pada Data Pekerja Seks Komersial Di Klinik Reproduksi Putat Jaya Surabaya), Alia Lestari, Purhadi Purhadi, Madu Ratna
Pemodelan Regresi Zero Inflated Poisson (Aplikasi Pada Data Pekerja Seks Komersial Di Klinik Reproduksi Putat Jaya Surabaya), Alia Lestari, Purhadi Purhadi, Madu Ratna
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Dalam menganalisis hubungan antara beberapa variabel, terdapat sejumlah fenomena dimana variabel responsnya berbentuk biner ataupun berbentuk diskrit. Fenomena dimana variabel responsnya berbentuk diskrit tapi tidak biner, biasanya dianalisis dengan Regresi Poisson. Namun demikian dalam kasus tertentu sering dihadapi suatu peristiwa yang sangat jarang terjadi atau responsnya mempunyai data nol yang sangat banyak, sehingga analisis dengan pendekatan distribusi Poisson seringkali tidak lagi memberikan kesimpulan yang tepat.
Pada penelitian ini akan dikaji suatu metode untuk mengatasi banyaknya respons bernilai nol yang telah dikembangkan oleh Lambert (1992) yaitu Regresi Zero-Inflated Poisson (ZIP). Estimasi parameter model ini menggunakan Algoritma EM dan pengujian hipotesisnya menggunakan …
Suatu Kajian Analitis Pada Sistem Persamaan Air Dangkal, Sudi Mungkasi
Suatu Kajian Analitis Pada Sistem Persamaan Air Dangkal, Sudi Mungkasi
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Makalah ini mengkaji sistem persamaan air dangkal secara analitis. Dua bentuk sistem persamaan air dangkal dibuktikan ekuivalen. Sifat hiperbolik, karakteristik, gelombang sederhana, pertidaksamaan entropi, dan gelombang shock dipaparkan.
Kata kunci : persamaan air dangkal, sistem hiperbolik, gelombang sederhana,pertidaksamaan entropi, gelombang shock
Partial Least Squares (Pls) Generalized Linear Dalam Regresi Logistik, Retno Subekti
Partial Least Squares (Pls) Generalized Linear Dalam Regresi Logistik, Retno Subekti
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Kasus multikolinieritas seringkali dijumpai dalam regresi yang mengakibatkan salah interpretasi model regresi yang terbentuk. Seperti halnya dalam regresi linear, dalam regresi logistik kasus multikolinearitas juga dapat menjadi masalah, karena adanya korelasi yang cukup tinggi antara variabel prediktornya. Sehingga untuk mengatasi masalah seperti ini, akan digambarkan aplikasi prosedur partial least squares terhadap suatu kasus regresi logistik khususnya dalam contoh kasus makalah ini adalah regresi logistik ordinal.
Kata kunci : Partial Least Square generalized linier , multikolinieritas, regresi logistik
Syarat Fritz John Pada Masalah Optimasi Berkendala Ketaksamaan, Caturiyati Caturiyati
Syarat Fritz John Pada Masalah Optimasi Berkendala Ketaksamaan, Caturiyati Caturiyati
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Syarat-syarat optimasi masalah optimasi berkendala merupakan perluasan syarat-syarat optimasi masalah optimasi tak berkendala. Pada paper ini diuraikan syarat Fritz John yang merupakan perluasan syarat optimasi masalah optimasi tak berkendala untuk menyelesaikan masalah optimasi berkendala.
Kata kunci : syarat Fritz John, masalah optimasi berkendala, masalah optimasi tak berkendala
Pemodelan Inventory Dengan Dua Gudang Penyimpanan Untuk Barang Yang Mengalami Penyusutan Dengan Backlog Shortage Sebagian Dan Lead Time Fuzzy, Dwi Ertiningsih, Widodo Widodo
Pemodelan Inventory Dengan Dua Gudang Penyimpanan Untuk Barang Yang Mengalami Penyusutan Dengan Backlog Shortage Sebagian Dan Lead Time Fuzzy, Dwi Ertiningsih, Widodo Widodo
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Adanya kebijakan optimalisasi inventory yang diambil sebuah perusahaan atau retailer untuk barang yang mengalami penyusutan dengan ketidakpastian waktu tunggu (lead time) sampai barang selesai diproduksi atau pesanan datang, adanya Backlog Shortage sebagian atau penuh, dan tingkat permintaan bergantung harga dikembangkan dalam sistem dua gudang yang masing-masing sebagai gudang penjualan (display) atau tempat transaksi barang dan gudang tempat penyimpanan jika barang yang diproduksi atau dibeli tidak cukup ditempatkan di gudang penjualan. Tujuan perusahaan atau retailer mempunyai dua gudang penyimpanan adalah untuk mengoptimalkan keuntungan rata-rata jika memproduksi atau membeli barang dalam jumlah besar. Perusahaan atau retailer mempunyai satu gudang dengan kapasitas terbatas …
Analisis Regresi Logistik Ordinal Untuk Mengetahui Faktor-Faktor Yang Mempengaruhi Status Gizi Balita Nelayan Kecamatan Bulak Surabaya, Destri Susilaningrum, Citra Elok Megahardiyani
Analisis Regresi Logistik Ordinal Untuk Mengetahui Faktor-Faktor Yang Mempengaruhi Status Gizi Balita Nelayan Kecamatan Bulak Surabaya, Destri Susilaningrum, Citra Elok Megahardiyani
PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika
Keadaan gizi balita di Indonesia belum seluruhnya memenuhi kriteria baik, salah satunya adalah di kecamatan Bulak Surabaya. Standart penilaian status gizi di Indonesia menggunakan aturan WHO-NCHS, melalui nilai Zscore yang merupakan salah satu indikator antropometeri yaitu pengukuran berat badan berdasarkan umur (BB/U). Penelitian ini bertujuan untuk mengetahui karakteristik ibu dan balita nelayan serta menentukan faktor-faktor yang mempengaruhi status gizi balita nelayan di Kecamatan Bulak Surabaya. Metode yang digunakan adalah statistik deskriptif dan analisis regresi logistik ordinal. Hasil analisis yang dilakukan menunjukkan bahwa karakterstik ibu balita nelayan di kecamatan Bulak Surabaya 66% berpendidikan tidak tamat SMP, 67% usia ibu menikah ‰¤ …
Performance Of Dmt-Based Liquefaction Evaluation Methods On Case Histories Of Chi-Chi Earthquake, Gordon Tung-Chin Kung, Der-Her Lee, Pai-Hsiang Tsai
Performance Of Dmt-Based Liquefaction Evaluation Methods On Case Histories Of Chi-Chi Earthquake, Gordon Tung-Chin Kung, Der-Her Lee, Pai-Hsiang Tsai
Journal of Marine Science and Technology
This study examines two recently-developed DMT-based methods, one CRR7.5-KD boundary curve and one CRR7.5-ED boundary curve, for evaluating the liquefaction resistance of soils using in-situ test data. The collected data consist of a number of liquefied and non-liquefied case histories, which were performed shortly after the disastrous Chi-Chi earthquake in 1999. The results of examining the CRR7.5-KD and CRR7.5-ED boundary curves showed that both curves are capable of accurately estimating the liquefaction resistance of soils and thus the liquefaction potential of soils. The developed DMT-based methods therefore have the potential to be an alternative to the existing procedure of liquefaction …
Aerosol Optical Depth Retrieval For Spot Hrv Images, Chien-Hui Liu, Gin-Rong Liu
Aerosol Optical Depth Retrieval For Spot Hrv Images, Chien-Hui Liu, Gin-Rong Liu
Journal of Marine Science and Technology
Atmospheric aerosol is an important factor of the Earth’s radiation budget. The aerosol optical depth (AOD) is also the key parameter in generating surface products from remotely sensed data. An image-based retrieval algorithm of aerosol characteristics and surface reflectance is used to retrieve the AOD from SPOT satellite images in this paper. The accuracy of retrieved AOD is assessed using sunphotometer measurements. SPOT satellite images in Jhongli , Taoyuan county are used to testify the algorithm. The results show that the rootmean-square error (RMSE) of the retrieved AOD at 0.55 µm is 0.10. Over the range of measured AOD 0.08~0.34, …
Unsteady Motions Of Separated Shear Layer In Wake Flow Due To Upstream Disturbance, Chin-Tsan Wang, Jun-Ji Miau, Cheng Kuang Shaw
Unsteady Motions Of Separated Shear Layer In Wake Flow Due To Upstream Disturbance, Chin-Tsan Wang, Jun-Ji Miau, Cheng Kuang Shaw
Journal of Marine Science and Technology
The phenomenon of physical wake flow is complex and remains relatively unknown, especially for the relationship between the span-wise motions of separated shear layers and low frequency variations embedded in the vortex shedding process of upstream disturbances. In this study experiments were executed by situating a mesh grid and controlling cylinder upstream. Results showed that the integral time scale of the span-wise motions for a separated shear layer was close to that of the low frequency variations for an upstream disturbance. This evidence supports the idea that span-wise motions of a separated shear layer and the low frequency variations should …
An Enduring Technology: The Horse Logging Tradition In Maine, James E. Passanisi
An Enduring Technology: The Horse Logging Tradition In Maine, James E. Passanisi
Maine History
No abstract provided.
Minerva 2009, The Honors College
Minerva 2009, The Honors College
Minerva
This issue of Minerva includes a story on alumna Betsy Leitch and her husband Bill Leitch, Betsy's connection to Colvin Hall, and their ongoing support of Honors; an article about Colvin Hall renovations and the opening of the Margaret Chase Smith Visiting Faculty Suite; and an interview with Pulitzer Prize-winning Honors graduate, Bettina Boxall. Other highlights include the story of Honors graduate Adam Jones and his involvement in saving the USS Alabama.